Before replacing newline characters, decide whether you are removing soft line wraps or reducing extra blank lines. Both appear as line breaks, but they carry different meaning. In the current verified Rune Studio search route, direct newline and blank-line replacement returned zero matches, so this article does not claim that the bulk operation works there. It uses a safe fallback instead.
Newlines are document structure
Replacing every line break with a space can destroy paragraph boundaries, dialogue turns, lists, poetry, and Markdown syntax. Build a thirty-line duplicate with eight intended blank lines and four soft breaks, and label which ones should change before running any tool.
The expected list is the control. If a preview does not return those locations, do not apply it.
What the zero-match result means
Two common newline patterns were tried against a sample containing multiple line breaks. Preview and application both reported zero changes. That does not mean the sample had no blank lines. It means the tested search route did not directly target them.
Zero is therefore a blocked operation, not a successful cleanup. Counting it as completion would leave the manuscript unchanged while giving false confidence.
Use a manual or external fallback on a copy
For a handful of locations, show editing marks, read the sentences on both sides, and remove the unwanted blank line one at a time. Re-read the joined sentence immediately.
For many locations, use a tool that explicitly supports newline patterns, but only on a duplicate. Preview the locations, compare them with the labelled control list, and then reopen the result in Rune Studio to inspect chapter boundaries, dialogue, and Markdown structures.
A zero-result search is still useful evidence: it tells you that the tested field and mode did not identify newline characters. Keep that outcome with the copied file, and do not convert it into a successful bulk-replacement claim. If another tool performs the transformation, reopen the result in Rune Studio and compare the line structure before accepting it.
Separate line-ending normalization from paragraph editing
LF versus CRLF is a storage convention. Removing a paragraph break is an editorial change. Do not perform both in the same transformation, because an all-lines diff will hide the meaningful structural edits.
The safe conclusion is deliberately modest: ordinary text search and line-ending inspection are useful, but direct bulk replacement of newline characters was not confirmed in the tested path. Review current capabilities on the Rune Studio product page, and preserve a labelled duplicate whenever paragraph structure is being changed.